Sparrow, the email client for iPhone that was recently acquired by Google, surprisingly received an update that includes support for the iPhone 5's larger display and the ability to open Passbook attachments. The is surprising because with the acquisition, the developers said that there was no plan to release new features to the Sparrow apps.
Now, iPhone 5 and Passbook support aren't exactly huge new features, but still more than I was expecting. However, there are many reports of this new version causing the app to crash and be unusable, so if you use Sparrow as your primary mail client on your iPhone, you may want to stay clear of the update for now.
Do any of you still use Sparrow? How's the update working out for you?